Hydroforming process of manufacturing for reverse spiral origami structure

Kong, Chenghai; Zhao, Xilu; Hagiwara, Ichiro

doi:10.1504/ijvp.2017.086908

Cited by 3 publications

(3 citation statements)

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“…It has been considered how good machining quality can be achieved inexpensively for the RSO with a three-dimensional complicated shape. Hydroforming is a candidate process [30], and the fluid processing was demonstrated by Kong et al as follows [31]. Figure 3 is a schematic drawing of the hydroforming process, which has four main steps: first, an insert pipe is set into a die (as shown in Fig.…”

Section: Proposal Of Reversed Torsion Origami Structure and Conventional Energy Absorbersmentioning

confidence: 99%

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Reversed-Torsion-Type Crush Energy Absorption Structure and Its Inexpensive Partial-Heating Torsion Manufacturing Method Based on Origami Engineering

Zhao

Kong²,

Yang

et al. 2021

Journal of Manufacturing Science and Engineering

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Current vehicle energy absorbers face two problems during a collision in that there is only a 70% collapse in length and there is a high initial peak load. These problems arise because the presently used energy-absorbing column is primitive from the point of view of origami. We developed a column called the Reversed Spiral Origami Structure (RSO), which solves the above two problems. However, in the case of existing technology of the RSO, the molding cost of hydroforming is too expensive for application to a real vehicle structure. We therefore conceive a new structure, named the Reversed Torsion Origami Structure (RTO), which has excellent energy absorption in simulation. We can thus develop a manufacturing system for the RTO cheaply. Excellent results are obtained in a physical experiment. The RTO can replace conventional energy absorbers and is expected to be widely used in not only automobile structures but also building structures.

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Section: Proposal Of Reversed Torsion Origami Structure and Conventional Energy Absorbersmentioning

confidence: 99%

“…To form RSO, Hagiwara et al thus applied for a patent on hydroforming [30] and Kong et al attempted to adopt hydroforming more cheaply through optimization analysis [31]. However, hydroforming is too expensive when manufacturing the RSO of a real vehicle structure.…”

Section: Introductionmentioning

confidence: 99%

Reversed-Torsion-Type Crush Energy Absorption Structure and Its Inexpensive Partial-Heating Torsion Manufacturing Method Based on Origami Engineering

Zhao

Kong²,

Yang

et al. 2021

Journal of Manufacturing Science and Engineering

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“…Its shape and characteristics are close to those of a cylinder, so manufacturing inspired by hydroforming has been used. Kong et al conducted an optimization analysis to improve the formed thickness and avoid fractures [29]. Liang et al designed and studied a reverse torsion-type crash energy-absorption structure, obtained by an inexpensive partially heated torsion manufacturing method [30,31].…”

Section: Introductionmentioning

confidence: 99%

A Cylindrical Crash Absorber with Discontinuous Protrusions and Its Manufacture Using a Successive Partial Rubber-Bulging Method

Liang

Feng

et al. 2021

Applied Sciences

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In an effort to improve impact energy-absorption characteristics, this study introduces a cylindrical crash absorber (CAP) with discontinuous protrusions and a continuous local-expansion plastic-forming method for its manufacture. The mechanical properties of the cylindrical energy-absorption structure were modified by installing multiple particle protrusions on the cylinder sidewall to reduce the initial pickup load and improve the impact energy-absorption performance. To facilitate manufacture of the proposed CAP, a cylindrical rubber piece was placed into a cylindrical tube and pressure was applied to the rubber from both ends of the tube. The CAP was formed by the bulging force of the rubber. The formability was verified by developing a successive local bulge-forming experimental device and comparing the manufactured CAP with the results of numerical simulations. Testing of quasi-static collapse conducted on a CAP manufactured using this device verified the effectiveness of the proposed CAP design and its plastic-forming method. It was determined that this design reduced the initial peak load, and the crash absorber could maintain stability over a long, continuous distance during crushing deformation.

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変形誘発で衝撃エネルギー吸収を調節できるプレス折線加工の提案

Terada

2023

Transactions of the JSME (In Japanese)

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Press forming is a mass production method that is used to manufacture many machine components such as automobiles, industrial machinery, and various plants. However, there is a limit to the degree of shape freedom that can be applied, so countermeasures against cracks, wrinkles, spring-back, etc., must be taken in the development process. It is well known that it is difficult to apply it economically in the case of small-lot production because of its high capital investment. In a previous report, the author reported that the folding line processing by press method / bending has a high degree of shape freedom, requires little capital investment, and can be expected to be applied for experiments and prototypes from small to mass production. This paper shows that press folding line processing using V-shaped punch can be applied as deformation induction based on experiments and FEM results. To improve the impact energy absorption performance in the event of a collision, notches and uneven surfaces called beads have been formed in the crush boxes and front side members as automobile parts manufactured by press forming. The bead has the function of inducing deformation so as to improve the impact energy absorption performance during the axial crushing process. However, bead setting for inducing deformation by the press forming, in addition to the difficulty of mold design/manufacturing, needs to correct the bead design after impact experiments using prototypes. This paper shows press folding line processing as deformation induction is very convenient and effective.

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Hydroforming process of manufacturing for reverse spiral origami structure

Cited by 3 publications

References 0 publications

Reversed-Torsion-Type Crush Energy Absorption Structure and Its Inexpensive Partial-Heating Torsion Manufacturing Method Based on Origami Engineering

Reversed-Torsion-Type Crush Energy Absorption Structure and Its Inexpensive Partial-Heating Torsion Manufacturing Method Based on Origami Engineering

A Cylindrical Crash Absorber with Discontinuous Protrusions and Its Manufacture Using a Successive Partial Rubber-Bulging Method

変形誘発で衝撃エネルギー吸収を調節できるプレス折線加工の提案

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